# Full text of "The Flow Of Gases In Furnaces"

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APPENDIX VII

Gas
Air
Gas on
Air on

on
on
Waste
Waste

Gas
Air
Gas
Gas

-y=frictional resistance in kg per

0.016X2.174X6.60X0.208 =
0 kg 048

0 016X1 947X6 39X0 239 =

0 kg 048

0.016X2.174X8 19X0 192 =

0 kg 055

0 016X1 947X7 23X0 192 =

0 kg 043

7 may be considered as kg per

m2 or as mm of water

The pressure required to create the

air and gas velocity above the

checkerwork =

5 = (vf ~s-20) Aj kg per m2 .......
0 kg 462
0 kg 498
0 kg 657
0 kg 512

The height from the bottom of the checker chambers to the
port sill or bridge of the furnace can now be fixed from dimensions
that have been determined. This permits the approximation of
the chimney effect of the checkers and uptakes. The height will
be found as follows:

Flues below checker chamber .............
1 m 000
3 280 ft

Checkerwork height ...............................
7m 000
22.963ft

Checker to arch at center
1 600
5 249

J^rom bottom of arch to port sill
9 m600 3m 000
31.492ft 9 844

H — total height to port sill ........................
12 m 600
41.336ft

Chimney Effect of Checkers and "Uptakes
Gas on Gas
Air on Air
Gas on Waste Gas
Air on Waste Gas

5 ^^(Aair — Agas t°) ...........

£ ° = average temperature
850°
750°
1200°
1100°

1 -^.(xt = gas factor .....
4 1195
3 7525
5 4040
5 0370

Ao = specific weight of gases .... Afgass=Ao-s"(l"r'**0 kg perm3 .....
1.125 0.273
1.293 0 345
1.32
0 244
1.32 0 262

A&IT = specific weight of air .......
1.293

Aair — Ajgag = kg per m3
1 020
0 848
1 049
1 031

\$1 = 12.60X1.02  =kgperm2..
12 kg 851

52 = 12 60X 0.848= kg per m2

10 kg 683

53 = 12. 60X1. 049=kg per rn2. .

13 kg 217

54 = 12. 60X1. 031 =kg perm2. .

12 kg 990

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